Collapsible core structure.



L. D. BOWER & s. B. ELDER. COLLAPSIBLE CORE STRUCTURE.

APPLICATION FILED FEB. H 1919 1,299,542. Patented Apr. 8,1919.

' 3 3HEETS--$HEET Z 5' to A Q (Q l) O l 1 WD.W% INVENTORS L. D. BOWER &S. B. ELDER,

COLLAPSIBLE CORE STRUCTURE. APPLICATION FILED FEB. H. IBIS.

Patented Aprp8, 1919.

3 SHEETS-SHEET 2 Wm ATTORNEY L. 0. BOWER & s.. B. ELDER.

COLLAPSIBLE CORE STRl JCTURE. APPLICATION FILED FEB. 11,4919.

3 SHEETS-SHEET 3.

G fmmwnlmvrofis x BY A TTOR/VEY Patented Apr. 8, 1919,

FFICE.

LEMON D. IBOWER AND SAMUEL B. ELDER, OF WARSAW, OHIO.

' GOIJIIAPSIBLE CORE STRUCTURE.

Specification of Letters Patent.

Patented Apr. 8, 1919.

Application filed February 11, 1919. Serial No. 276,253.

To all whom it may concern:

Be it known that we, LEMON D. BOWER and SAMUEL B. ELDER, citizens of theUnited States, residing at Warsaw, Ohio, have invented certain new anduseful Improvements in Collapsible Core Structures, of which thefollowing is a specification, reference being had therein to theaccompanying drawings.

This invention comprises a collapsible core structure.

While its application is unrestricted, it is especially adapted for usein connection with the production of concrete or other lastic elementssuch as culverts, ditches, co umns, and the like.

It is contemplated among the objects of the invention to provide asimple and, effective structure of this type which can be expanded tosupport the so-called forms used in the building of plastic elements ofthe type mentioned; which will have few parts; which will be strong andarranged in unit form so that any length can be accommodated by additionor subtraction of these units; which will, when expanded, support theforms in solid and permanent position, preventing warping andunevenness; and which can be dismounted by a simple movement of certainparts, this movement being transmitted to all of the unitssimultaneously.

Other objects and advantages will in part be apparent and in part bebrought out more fully in the description which follows:

Drawings illustrating an embodiment of the invention are heretoappended, the following views being shown:

Figure 1 is a view in longitudinal section illustrating an embodiment ofthe invention applied to the construction of a culvert or the like;

Figs. 2 and 3 are cross sectional views of the same showing the core inexpanded and retracted position respectively;

Fig. 4 is an enlarged detail view partly in section of a portion of theapparatus;

Figs. 5, 6, 7 and 8 are views in end elevation of portions of theapparatus;

Figs. 9 and 10 are an end elevation and a cross section respectively ofa portion of a form support;

Fig. 11 is a cross section of a slightly modified construction of thisform support;

Fig. 12 is an end elevation of still another modification; and

Fig. 13 is a crosssectional view on line 1313, Fig. 12.

Referring specifically to these drawings, the core comprises as hereinshown a central rod 1, which may be provided with couplings or the like2 to accommodate it to any desired length by the addition of extensionsto the rod. Fixedly secured to this rod intermediate its ends arecollars 3 suitably secured as by a bolt or the like 4 and upon thesecollars there are yokes or spanner arms 5 to which are pivoted theextremities of lever arms 6. To the other end of these lever arms thereare pivoted links which are in turn pivotally secured to arms 8 carriedby a collar 9 slidably mounted on the central rod 1. Upon the lever arm6 and in proximity to the links 7, there are secured form carryingflanges generally designated by the numeral 10. These are carried byyokes or the like 11 which are in turn secured to the lever arms 6. Itwill be seen that when the parts are in the position shown in Fig. 4,the lever arms 6 will have reached the extremity of their outwardmovement and a stop 12 is provided to limit this movement. This stop issuitably secured to the rod 1 as by a screw or the like 13.

For the purpose of limiting the outward movement of the collar 9 andlinks 7, a similar stop 14 is provided and to facilitate the withdrawalof the collar alever 15 having spanner arms 16 and hook links 17 isprovided. As shown in Fig. 4, the spanner arms 16 are arranged back ofthe stop 14 and the hook links 17 connected with a portion of the collar9 whereupon motion imparted to the lever in the direction of the arrowwill withdraw the collar and permit a collapsing of the form carryingflanges as illustrated particularly in Fig. 3.

As previously stated, there are as many of these units as-desirable andit is customm to connect the collars 9 so that the actuation of theforms will be simultaneously accomplished. For this purpose and as hereshown, the collar 9 carries extension arms 18 provided with openingsthrough which rods 19 are adapted to pass and be secured within the armssuitably aS by bolts 20.

For the purpose of providing for a large range of varying widths ordiameters, a form-carrying member is provided which may be built up intoany desired number of units. As shown particularly in Figs. 9 to 13,this comprises, in Figs. 9 and 10, an

angle iron member 21 having a flange 22 adapted to hook under acorresponding flange on the form-carrying member and be secured theretosuitably as bya clip 23;

This angle iron member 21 has a lip or the like 22 provided with anopening through which a bolt or the like is adapted to secure a flangeof an angle iron member 24 which carrying members are provided with aradial flange 26 and spaced apart angular lips 27 adapted to be securedtogether suitably as by bolts 28, the openings in the clips and flangesbeing inproximity ahned when assembled.

- In the use of the form for construction purposes, wood, metal, orother form sections, designated in Figs. 1, 2 and 3, by the numeral 3-1are arranged around theform carriers and a strip of metal or the like 35generally used to close any. small space exlsting at'the top of theform. Concrete or the like 36 is then poured around the forms and whensufliciently set, the lever 15 is actuated to spring the links 7 topermit the forms and form-carriers to collapse to the position shown inFig. 3 when the parts may be easily removed. 7 g

7 From the foregoing it will be apparent that the present inventioncomprises a s mple, strong and practical means of efiecting the objectsand advantages herein'beforeset forth, and while it has been illustratedin the embodiment herein shown, it will be understood that many changesin the general arrangement and construction of the parts may be efiectedwithout departing from the spirit of the invention or its scope as setforth in the claims.

What we claim is 1. A collapsible core structure comprising, incombination, a rod member, a collar disposed thereon, lever-armspivotally secured at one end to said collar, link members secured to theother ends of said lever arms, a second collar slidably arranged on saidrod, said link members being also secured to said movable collar, andform-carrying members disposed on said lever arms intermediate the endsthereof.

2. A collapsible core structure comprising,

in combination, a rod member, a collar disposed thereon, lever-armspivotally secured at one end to said collar, link members secured tothe'other ends of said lever-arms; a second collar slidably disposed onsaid rod, said link members being also secured to said movable collar,form-carrying members dis posed on said lever arms intermediate the endsthereof, and means for connecting a L. A collapsible core structurecomprising,

in combination, a rod member, a collar disposed thereon, lever-armspivotally secured at one end to said collar, link members secured to theother ends of said lever arms a second collar slidably disposed-on saidrod, said link members"being also secured to said movable collar, andform-carrying members disposed on said lever members intermediate theends thereof, said form-carrying members comprising a plurality of unitsadapted to be associated and mounted upon said lever arms.

5. A. collapsible core structure comprising a central rod, a collardisposed thereon, lever arms pivotally secured at one end to saidcollar, link members pivotally secured to theopposite ends of saidlever-arms, a movable collar disposed on said rod, a stop for limitingthe movement of said movable collar; arm members disposed on saidcollar; means associated with the arm members for securinga plurality ofcollars together; form-carrying members disposed on said leverarmsintermediate the ends thereof and comprising a pluralityof membersadapted to be associated together to .vary th size of the form; andmeans for actuating the movable collar to collapse the forms.

In testimony whereof we' hereunto afiix our signatures.

LEMON D. BOWER.

' SAMUEL B. ELDER.

Witnesses:

RAY Mrznn, HERBERT A. PARRISH.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents.

Washington, D. 0. p

